You can set Preferred Servers, which will be displayed at the top of the list when  you launch Client (see Starting an Axxon Next Client).

To do it, follow the steps below:

1. Go to Settings → Options → Automatic connection (1–2).
   
2. Select the Server in the list (3).
3. Click Add Preferred Server (4).
4. Repeat the steps for all target Servers.
5. Click Apply.